support trailing commas

Author: shmax

src/Parser/TypeParser.php

@@ -226,6 +226,11 @@ private function parseArrayShape(TokenIterator $tokens, Ast\Type\TypeNode $type)
 
 		while ($tokens->tryConsumeTokenType(Lexer::TOKEN_COMMA)) {
 			$tokens->tryConsumeTokenType(Lexer::TOKEN_PHPDOC_EOL);
+			if($tokens->tryConsumeTokenType(Lexer::TOKEN_CLOSE_CURLY_BRACKET)) {
+				// trailing comma case
+				return new Ast\Type\ArrayShapeNode($items);
+			}
+
 			$items[] = $this->parseArrayShapeItem($tokens);
 		}
 

tests/PHPStan/Parser/TypeParserTest.php

@@ -477,6 +477,36 @@ public function provideParseData(): array
 					),
 				]),
 			],
+			[
+				'array{
+				 	a: int,
+				 }',
+				new ArrayShapeNode([
+					new ArrayShapeItemNode(
+						new IdentifierTypeNode('a'),
+						false,
+						new IdentifierTypeNode('int')
+					),
+				]),
+			],
+			[
+				'array{
+				 	a: int,
+				 	b: string,
+				 }',
+				new ArrayShapeNode([
+					new ArrayShapeItemNode(
+						new IdentifierTypeNode('a'),
+						false,
+						new IdentifierTypeNode('int')
+					),
+					new ArrayShapeItemNode(
+						new IdentifierTypeNode('b'),
+						false,
+						new IdentifierTypeNode('string')
+					),
+				]),
+			],
 			[
 				'array{
 				 	a: int,